Haoyue Gong, Jianbo Guo, Qiang Guo, et al. Overvoltage Calculation Method for Sending System Under DC Fault Disturbance Considering the Influence of Renewable Energy[J]. CSEE Journal of Power and Energy Systems, 2024, 10(5): 1865-1875.
DOI:
Haoyue Gong, Jianbo Guo, Qiang Guo, et al. Overvoltage Calculation Method for Sending System Under DC Fault Disturbance Considering the Influence of Renewable Energy[J]. CSEE Journal of Power and Energy Systems, 2024, 10(5): 1865-1875.DOI: 10.17775/CSEEJPES.2023.00290.
Overvoltage Calculation Method for Sending System Under DC Fault Disturbance Considering the Influence of Renewable Energy
Bipolar blocking and commutation failure in the renewable energy transmission system through ultra-high voltage direct current will produce significant temporary overvoltage. This paper analyzes the physical process of sending end grid overvoltage caused by two types of DC faults and establishes a DC overvoltage model considering renewable energy sources. According to characteristics of the sending end grid
the influence of the system equivalent impedance
the proportion of renewable energy output
the active and reactive power coefficients of the renewable energy sources during the low voltage ride through process on the overvoltage is analyzed respectively
and the relationship between the proportion of renewable energy output and the short-circuit ratio under the overvoltage constraint is constructed. The validity and practicality of the model and analysis method proposed in this paper are verified by combining the typical transmission system at the sending end of the actual power grid and regional power grid systems.